Google is inviting iPhone and iPad owners into its augmented reality game Ingress after it finally launched an iOS app. The Android version opened to all last December, and now it has quietly made its way into the App Store without an official announcement from Google — save this Google+ post from gamer Fevenis Silverwind of Niantic Labs, the Google-run company that operates the unique game. For those who are unaware of it, Ingress is a mobile-based alternate reality game in which players are part of either the resistance or enlightened teams battling to collect and control the powerful ‘Exotic Matter,’ which is virtually located…

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